Closed-form expressions for the spectral regrowth and ACPR of CDMA signal passed through a nonlinear amplifier by a digitally modulated carrier are derived using the power series and statistical methods of high order cumulant.
利用幂级数和和高阶累计量的统计方法,估计出基于IS-95模型CDMA(码分多址)信号前向链路通过弱非线性RF功率放大器产生的频谱增生和邻道功率比的严谨表达式,由此获得了经该放大器特征模型变换的输出信号自相关函数的解析表达式。
The relationship between EVM and ACPR is derived in this paper.
推导了无线通信系统误差向量幅度(EVM)与邻道功率比(ACPR)指标的相互关系,得出了通过功放线性化改善ACPR使得系统EVM减小的结论。
6dB and 6dB improvement of third-order intermodulation(IMD3) and adjacent channel power ratio(ACPR) respecti.
最后用一个双音信号和一个cdma2000信号对此电路进行了仿真,结果表明三阶互调(IMD3)和邻道功率比(ACPR)分别改善了22。
